BSCAN multi standard parallel I/O module

RS232, RS485, RS422, LVDS I/O levels

Features:

• 16 RS485/RS422 I/O channels for interface logic drive and sense
• 8 LVDS I/O channels for interface logic drive and sense
• 8 RS232 Input channels for interface logic sense
• 8 RS232 Output channels for interface logic drive
• High reliability DIN41612 I/O connector
• Reliable screw lock brackets
• Mechanical dimensions 122mm X 70mm
• 96 bit Boundary-scan Register Length
• Each segment can be independently bypassed
• Medium-speed 10MHz TCK for high reliability at the best cost/performance ratio
• Each RS485/RS422 or LVDS I/O pin is independently programmable for sense, drive, bi-directional, and tri-state operation
• Fully-compatible JTAG/IEEE 1149.1 Test Access Port (TAP)
• Operating power 3.3V, 5.0V
• Optional LVDS TCK interface can be used in large fixtures to avoid noise and skew problems.
• Full self test capability using internal loopback.

General Description

The BSPIO-STDIF1688 provides bi-directional parallel-scan access to up to 40 electrical nodes with various distinct interfaces for the driving and sensing of logic values. This module increases the effectiveness of boundary-scan testing, enabling verification of all board connectors and within logic clusters. The BSPIO-STDIF1688 is available in two basic versions, both of them compatible with standard DIN41612 female connectors in a test fixture. One version, the BSPIO-STDIF1688-A1, is primarily intended for test fixtures with few BSPIOs, and contains a standard TTL interface on the TAP’s TCK signal. This module facilitates boundary-scan interconnection testing using direct connection to the JTAG/IEEE 1149.1 Test Access Port (TAP).
The other version, the BSPIO-STDIF1688-A2, is intended for test fixtures with many BSPIOs and contains a balanced LVDS interface on the TAP’s TCK signal. This module facilitates boundary-scan interconnection testing using a small interface connection to a JTAG/IEEE 1149.1 TAP. Other low-end versions (ex: 16 channel RS422/R485) are derived from these two basic models. All BSPIO I/O interfaces (RS485/RS422, LVDS) have an internal loopback for self test capability, while input only and output only interfaces (RS232) are cross connected via a weak resistor to ensure the self test capability.

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